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EAST/WEST HIGHWAY - DHARAN/DHANKUKTA ROAD. QUARTERLY REPORT

Details are given of the works carried out after the monsoon to counteract landslides, temporary road closures, and damage to river protection and keep open the east-west highway and the dharan-dhankuta roads in nepal. Data on equipment and labour forces are presented. For the east-west highway, a rehabilitation programme has been proposed but not yet approved, although storm damage has been rectified. Results of a traffic census and axle load survey for September 1985 are compared to surveys undertaken in December 1984, and March and June 1985. Traffic predictions made in June 1985, that dry season commercial traffic flow and loading would be greater than wet season flow, were found to be incorrect. The section of road between barghat and narayangarh is the most heavily trafficked of the butwal-narayangarh road and traffic damage is greatest in the direction towards narayangarh. Future growth rate of traffic and traffic damage expected during a 10 year design life are estimated. The average damage caused by trucks and by buses shows the influence of commercial traffic composition on the estimated total damage, buses causing much less damage than trucks. It is concluded that the remedial work will need an additional 15mm of crushed stone overlay material, unless buses form a higher proportion of the commercial traffic at night. River training and drainage works include (gabion protective wall, reinforced concrete box culvert, and concrete pipe culvert); pavement remedial works (subsoil drains and patching), and landslide control (composite walls, cut-off drain, check dams, gabion retaining wall) are described. On the dharan - dhankuta road, the repairs carried out before the monsoon, including all the transport and Road Research Laboratory'S proposals, proved to be adequate except for some damage to a gabion protection and the collapse of a composite masonry wall. Results of a traffic census and axle load survey in October 1985 are compared with surveys undertaken in December 1984, and March, June, and September 1985. Loads continue to be light; 50% of the vehicles being cars and landrovers. Commercial vehicle loads are controlled by the gradients. The monsoon damage (involving a composite wall, masonry cut-off drains, check dams, gabion cascade, gabion mattresses, river bank protection, bridges, gabion buttresses, and apron protection) is summarized. All general maintenance and repair works were undertaken by casual labour. This proved to be efficient and cost-effective. A nursery garden is to be established to propagate indigenous grasses, shrubs, and trees for the revegetation of slopes prior to the next monsoon. Expenditure, cost estimates and available funds are appended.

  • Corporate Authors:

    DEPARTMENT OF ROADS, ROADS REMEDIAL WORKS UNIT

    Kathmandu,   Nepal 

    ROUGHTON & PARTNERS, CONSULTING ENGINEERS

    ,    
  • Publication Date: 1985-9-30

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00487732
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1989 12:00AM